here is what you do, if you have time and the inclination.
Don't ever give out real info like your address, name, computer info or credit card (obviously) but string them along as if you really wanted their services. ask them to repeat what they said a lot (pretend that you are hard of hearing). Also, my favorite, pretend that someone is at the door and ask them to hold on. make a cup of coffee, sit back down and then ask them to repeat what they said.
they lose $$ wasting time with you and it is kind of fun.
A foreign lady called me from this number saying my computer had errors and needed to be fixed. She told me to open my computer and she would help me solve the issue. I asked her what kind of computer I had and she said it was for the Windows program. I told her I don't have windows due to having a Mac and she hung up.
A person with an Indian accent says there is a virus on my computer and for a fee they can have it removed. I told them this was a scam and hung up, but they keep calling.
I recieved a call from this number asking for my Mother by her name over 20 years ago.(had married since using that last name)
She has been dead over 8 years. It sounded like a man with a heavy accent. I told him no it was not her. They hung up.